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Self Diagnosis, Dolby -
Service Manual
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MDS-NT1
SERVICE MANUAL
Ver 1.0 2002.02
AEP Model UK Model E Model
US and foreign patents licensed from Dolby Laboratories Licensing Corporation. · OpenMG, "MagicGate", "MagicGate Memory Stick", "Memory Stick", VAIO, MusicClip, Net MD, and their logos are trademarks of Sony Corporation. · "WALKMAN " is a trademark of Sony Corporation. · Microsoft, Windows, Windows NT and Windows Media are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. · IBM and PC/AT are registered trademarks of International Business Machines Corporation. · Macintosh is a trademark of Apple Computer,Inc.in the United States and/or other countries. · MMX and Pentium are trademarks or registered trademarks of Intel Corporation. · All other trademarks are trademarks of their respective owners.TM and ® marks are omitted in this manual.
Model Name Using Similar Mechanism MD Mechanism Type Optical Pick-up Name
NEW MDM-7S2B KMS-262E
SPECIFICATIONS
System Disc Laser Revolutions (CLV) Error correction Sampling frequency Coding Modulation system Number of channels Frequency response Signal-to-noise ratio Wow and flutter MiniDisc digital audio system MiniDisc Semiconductor laser ( = 780 nm) Emission duration: continuous 800 rpm to 1800 rpm Advanced Cross Interleave Reed Solomon Code (ACIRC) 44.1 kHz Adaptive Transform Acoustic Coding (ATRAC)/ATRAC 3 EFM (Eight-to-Fourteen Modulation) 2 stereo channels 5 to 20,000 Hz ±0.8 dB Over 96 dB during playback Below measurable limit
Supplied accessories
· AC power adaptor (1) · USB cable (1) · Audio connecting cord
(stereo mini-plug ×1 y stereo mini-plug ×1) (1) · OpenMG Jukebox CD-ROM (1) · Operating instructions for OpenMG Jukebox (1)
Outputs
LINE (ANALOG) OUT Jack type: stereo-mini Rated output: 1 Vrms (at 50 kilohms) Load impedance: Over 10 kilohms Jack type: stereo-mini Rated output: 5 mW Load impedance: 32 ohms
· Do not connect the supplied AC power adaptor to a switched AC outlet (e.g., on an amplifier). · Use only the supplied AC power adaptor. Do not use any other AC power adaptor. Polarity of the plug
PHONES
General
USB port Where purchased series B, self powerd, full speed Power requirements*
Design and specifications are subject to change without notice.
Europe and other countries 220 230 V AC, 50/60 Hz * Using an AC power adaptor (supplied) Power consumption Dimensions (approx.) Mass (approx.) 6W 152 × 52 × 249 mm (w/h/d) incl. projecting parts and controls 1.0 kg
MINIDISC DECK
9-873-614-01
2002B0500-1 C 2002.02
Sony Corporation
Home Audio Company Published by Sony Engineering Corporation
MDS-NT1
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the Self-Diagnosis Function (Error History Display Mode)".
The deck's self-diagnosis function automatically checks the condition of the MD deck when an error occurs, then indicates the nature of the error through the two indicators. If the indicators light up or flash, find them in the following table and perform the indicated countermeasure. Should the problem persist, consult your nearest Sony dealer.
Playback Indicator (green) Recording Indicator (red) Flashes Flashes Cause/Remedy
The recording was not made properly. (C13/Rec Error) , Set the deck in a stable surface, and repeat the recording procedure. The inserted MD is dirty (with smudges, fingerprints, etc.), scratched, or substandard in quality. (C13/Rec Error) , Replace the disc and repeat the recording procedure. The deck could not read the TOC on the MD properly. (C13/Read Error) , Take out the MD and insert it again.
Flashes Lights up
The deck could not read the TOC on the MD properly. (C14/Toc Error) , Insert another disc. , If possible, erase all the tracks on the MD. There is an error in the internal data that the deck needs in order to operate. (E0001/MEMORY NG) , Consult your nearest Sony dealer. There is a problem with the optical pickup. (E0101/LASER NG) , Consult your nearest Sony dealer. An MD loading problem has occurred. (E0201/LOADING NG) , Consult your nearest Sony dealer.
Lights up
Lights up
Flashes
Flashes
Both indicators flash alternately
PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)
Note 1:The test mode and recording of this set are controlled by a personal computer, thus requiring the set to be connected to the PC. Prepare the personal computer in which necessary software is already installed. · Attached software "OpenMG Jukebox" (necessary for recording (check in, check out)) (Part No. : 4-237-880-01) · Software for test mode "TestMode_S.exe" ("TestMode_S.exe" and essential files "data_files.csv", "Net MDUSB.dil" are distributed together with the Service Manual. For the test mode, copy these three files in the same folder beforehand) Note 2:In the operation in the test mode, the operational description requiring "click [xxx]" means that you have to click the button on the screen. ("xxx" indicates the button name) Note 3:Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, click the [MENU/NO] to exit the mode.
1. Press the [B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. Click the [JOG UP] or [JOG DOWN] and when "[Service]" is displayed, click the [ENTER/YES]. 6. Click the [JOG UP] or [JOG DOWN] to display "Err Display". 7. Click the [ENTER/YES] to sets the error history mode and displays "op rec tm". 8. Select the contents to be displayed or executed using the [JOG UP] or [JOG DOWN]. 9. Click the [PUSH] to display or execute the contents selected. 10. Click the [PUSH] another time returns to step 8. 11. Click the [MENU/NO] to display "Err Display" and release the error history mode. 12. To release the test mode, quit the software for test mode after the [REPEAT] clicked.
Note: When retrying this operation, start from step1.
2
MDS-NT1
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode Display op rec tm Details of History Cumulative recording time is displayed. When cumulative recording time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, "Under 1 min" is displayed. The displayed time shows how long the laser is in high power state. It is about one fourth the actual recording time. Cumulative playing time is displayed. When cumulative playing time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, "Under 1 min" is displayed. Cumulative spindle motor running time is displayed. When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, "Under 1 min" is displayed. Displays the total number of retries during recording and number of retry errors during play. Displayed as "rss pss". "r" indicates the retries during recording while "p" indicates the retry errors during play. The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF. Displays the total number of errors. Displayed as "total ss". The number of errors is displayed in hexadecimal digits from 00 to FF. Displays the 10 latest errors. Displayed as "0s ErrCd@@". s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest). @@ indicates the error code. Refer to the following table for the details. The error history can be switched by clicking the [JOG UP] or [JOG DOWN]. Displays the past five retry addresses. Displays "ss ADRS ssss", ss is the history number, ssss is the cluster with the retry error. Select the error history number using the [JOG UP] or [JOG DOWN]. Mode to clear the error history and retry address history. [Operating method] 1) Click the [JOG UP] or [JOG DOWN] when "er refresh" is displayed. 2) The display will change to "er refresh?", and then click the [ENTER/YES]. The operation is over if "Complete!" is displayed. After this mode was executed, check the following: · The data have been cleared. · Perform the recording and playing to check that the mechanism operates normally. Mode to clear the "op rec tm" and "op play tm" histories. These histories serve as approximate indications of when to replace the optical pick-up. If the optical pick-up has been replaced, perform this operation and clear the history. [Operating method] 1) Click the [JOG UP] or [JOG DOWN] when "tm refresh" is displayed. 2) The display will change to "tm refresh?", and then click the [ENTER/YES]. The operation is over if "Complete!" is displayed. After this mode was executed, check the following: · The data have been cleared. · Perform the recording and playing to check that the mechanism operates normally. Mode to clear cumulative time of "op rec tm" and "op play tm". These historical data are used to determine the timing when the optical pick-up is to be replaced. When the optical pick-up was replaced, perform this operation to clear historical data. [Operating method] 1) Click the [JOG UP] or [JOG DOWN] when "op change" is displayed. 2) The display will change to "op chang?", and then click the [ENTER/YES]. The operation is over if "Complete!" is displayed. Mode to clear cumulative time of "spdl rp tm". This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle motor was replaced, perform this operation to clear historical data. [Operating method] 1) Click the [JOG UP] or [JOG DOWN] when "spdl change" is displayed. 2) The display will change to "spdl chang?", and then click the [ENTER/YES]. The operation is over if "Complete!" is displayed.
op play tm
spdl rp tm
retry err
total err
err history
retry adrs
er refresh
tm refresh
op change
spdl change
3
MDS-NT1
Table of Error Codes Error Code 10 12 20 21 22 23 24 30 31 40 41 42 43 50 51 60 Loading failed Loading switch combination is illegal Head of PTOC could not be read within the specified time Head of PTOC could be read but its content is erroneous Access to UTOC could not be made within the specified time UTOC could be not read within the specified 3time Content of UTOC is erroneous Playing could not start Content of sector is erroneous Cause of retry occurred during normal recording D-RAM overflowed and retry was executed Retry was executed during the writing to TOC S.F editing was interrupted by retry Address could not be read except in access processing Focusing failed and it is out of control Unlock retry Details of Error
4
MDS-NT1
TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION ........................... 2 1. 2. 3.
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11.
SERVICING NOTES ............................................... 7 GENERAL ................................................................... 12 DISASSEMBLY
Disassembly Flow ........................................................... Case (Upper) ................................................................... Main Board ...................................................................... MD Mechanism Deck (MDM-7S2B) ............................. Front Panel Section ......................................................... BD Board, Over Write Head (HR901) ........................... Holder Assy ..................................................................... Loading Motor Assy (M103) .......................................... Sled Motor Assy (M102) ................................................ Optical Pick-Up (KMS-262E) ........................................ Spindle Motor Assy (M101) ........................................... 13 14 15 15 16 16 17 17 18 18 19
4. 5. 6.
TEST MODE .............................................................. 20 ELECTRICAL ADJUSTMENTS ........................ 24 DIAGRAMS
36 37 38 39 40 41 42 43 44 45 46 47 51
6-1. Block Diagram SERVO Section ............................... 6-2. Block Diagram MAIN Section ................................. 6-3. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 6-4. Printed Wiring Board BD Board .............................. 6-5. Schematic Diagram BD Board (1/2) ........................ 6-6. Schematic Diagram BD Board (2/2) ........................ 6-7. Printed Wiring Board MAIN Board (Component Side) .............................. 6-8. Printed Wiring Board MAIN Board (Conductor Side) ................................ 6-9. Schematic Diagram MAIN Board (1/2) ................... 6-10. Schematic Diagram MAIN Board (2/2) ................... 6-11. Printed Wiring Board Panel Board ........................... 6-12. Schematic Diagram Panel Board .............................. 6-13. IC Pin Function Description ...........................................
7.
7-1. 7-2. 7-3. 7-4. 7-5.
EXPLODED VIEWS
Case Section .................................................................... Front Panel Section ......................................................... Case (B) Section .............................................................. MD Mechanism Deck Section-1 (MDX-7S2B) ............. MD Mechanism Deck Section-2 (MDX-7S2B) ............. 59 60 61 62 63
8.
ELECTRICAL PARTS LIST ............................... 64
5
MDS-NT1
The laser component in this product is capable of emitting radiation exceeding the limit for Class 1.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the bottom exterior.
Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
6
MDS-NT1 SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. NOTES ON REPLACING BD BOARD OR MD MECHANISM DECK In replacing the BD board or MD mechanism deck, perform the work through the steps provided below: 1. Remove the IC195 from the BD board to be replaced. 2. Remove the IC195 from new BD board. 3. Mount the IC195 on new BD board, which was removed from the BD board to be replaced. 4. Install new BD board in the set.
Note: The IC195 cannot be replaced with a new part. If IC195 is faulty, replace the entire BD board.
BD BOARD (Conductor Side)
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP · In cleaning the objective lens of optical pick-up, be sure the following below. 1. In cleaning the lens, do not apply an excessive force. As the optical pick-up is vulnerable, application of excessive force could damage the lens holder. 2. In cleaning, do not use a cleaner other than exclusive cleaning liquid (KK-91 or isopropyl alcohol). 3. Wipe the objective lens spirally from center toward outside. (See Figure A)
IC195
(Figure A)
OPERATION CHECK IN NORMAL MODE The set alone is capable of performing the play function only. In checking the recording and other functions, connect the set to the PC with a USB cable and perform the operation on the application software "OpenMG Jukebox" attached.
4. Eject the disc, if loaded. 5. Disconnect the power cord from the socket to shut off the power supply.
7
MDS-NT1
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND I+3V Iop TE VC RF FE : Ground : For measuring Iop (Check the deterioration of the optical pick-up laser) : For measuring Iop (Check the deterioration of the optical pick-up laser) : Tracking error signal (Traverse adjustment) : Reference level for checking the signal : RF signal (Check jitter) : Focus error signal
CN105
Iop TE I+3V GND FE VC RF
1 I+3V Iop GND TE FE VC RF 7 I+3V Iop GND TE FE VC RF
for MDM-7S2B
8
MDS-NT1
Note 1:The test mode and recording of this set are controlled by a personal computer, thus requiring the set to be connected to the PC. Prepare the personal computer in which necessary software is already installed. · Attached software "OpenMG Jukebox" (necessary for recording (check in, check out)) (Part No. : 4-237-880-01) · Software for test mode "TestMode_S.exe" ("TestMode_S.exe" and essential files "data_files.csv", "Net MDUSB.dil" are distributed together with the Service Manual. For the test mode, copy these three files in the same folder beforehand) Note 2:In the operation in the test mode, the operational description requiring "click [xxx]" means that you have to click the button on the screen. ("xxx" indicates the button name)
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED
The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure. Record Procedure: 1. Press the [ B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. Click the [JOG UP] or [JOG DOWN] to display "[Service]", and click the [ENTER/YES]. 6. Click the [JOG UP] or [JOG DOWN] to display "Iop Write" (C05), and click the [ENTER/YES]. 7. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 8. Input the Iop value written on the optical pick-up label. To select the number : Click the [JOG UP] or [JOG DOWN]. To select the digit : Click the [PUSH]. 9. When the [ENTER/YES] is clicked, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 10. As the adjustment results are recorded for the 6 value. Leave it as it is and click the [PUSH]. 11. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write (C05)". 12. Quit the software for test mode after the [REPEAT] clicked.
Note: When retrying this operation start from step1.
Display Procedure: 1. Press the [B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. Click the [JOG UP] or [JOG DOWN] to display "[Service]", and click the [ENTER/YES]. 6. Click the [JOG UP] or [JOG DOWN] to display "Iop Read" (C26), and click the [ENTER/YES]. 7. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value on the optical pick-up label. ##.# : indicates the Iop value after adjustment 8. To end, click the [PUSH] and [MENU/NO] to display "Iop Read" (C26). 9. Quit the software for test mode after the [REPEAT] clicked.
Note: When retrying this operation start from step1.
9
MDS-NT1
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in "5. Electrical Adjustments".
Note: This set uses optical pick-up KMS-262E in the production, but for the repair, only the KMS-262A is supplied. As a result, two types of optical pick-ups are used for this set, and the specified values for the check and adjustment of the laser power vary depending on the type.Details of the identify of KMS-262A/KMS-262E are described in "5-4. How to Identify Optical Pick-up KMS-262A/KMS-262E". (See Page 26)
Criteria for Determination (Unsatisfactory if specified value is not satisfied) Laser power check (5-7-2 : See page 28) · 0.90 mW power Specified value : 0.84 to 0.92 mW (KMS-262A) 0.90 to 0.96 mW (KMS-262E) · 8.40 mW power Specified value : 8.1 to 8.7 mW (KMS-262A) 8.4 to 8.9 mW (KMS-262E) · Iop (at 8.4mW) Labeled on the optical pick-up Iop value ± 10mA Auto check (5-7-4 : See page 29) Temperature compensation offset check (5-7-1 : See page 28) · Unsatisfactory if displayed as "NG: XXXX" NG (XXXX is arbitrary number) · Unsatisfactory if displayed as "T=@@ (##) [NG" NG (@@, ## are both arbitrary numbers)
Measure if unsatisfactory: · Clean the optical pick-up · Adjust again · Replace the optical pick-up
· Replace the optical pick-up
· Replace the optical pick-up
· Check for disconnection of the circuits around D101 (BD board) · Check the signals around IC101, IC201, CN102, CN103 (BD board)
Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
10
MDS-NT1
SERVICE MODE
Microcomputer Version Display Procedure: 1. Press the [B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. Enter the test mode, then click the [JOG UP] or [JOG DOWN] to display " ", and click the [ENTER/YES]. 6. "NT1-V**.****" is displayed. In the event of different display, click the [ENTER/YES] until it is displayed. "**.****" indicates the microcomputer version. Software Reset Procedure: 1. Press the [ B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. Quit the software for test mode after the [REPEAT] clicked.
Note: When retrying this operation, start from step 1.
System Requirements · IBM PC/AT or Compatible (The software does not run on Macintosh.) CPU: MMX Pentium® 233 MHz or higher (Pentium® II 400 MHz or higher is recommended) Hard disk drive space: 60 MB or more (The amount of necessary space depends on the version of the Windows OS or the size of your audio files.) RAM: 64 MB or more CD-ROM drive (capable of software installation and playback of an audio CD) Sound Board USB port (supports USB 2.0 Full Speed. (previously USB 1.1)) · Operating System: Windows® 98/Windows® 98 Second Edition/Windows® 2000 Professional/Windows® Me/Windows® XP Home Edition/Windows® XP Professional (manufacturer installed) The following environments are not supported. Windows® 95, Windows® NT, or other versions of Windows® NT (such as Server) An environment that is an upgrade of the original manufacturer-installed operating system, as in the following examples: Windows® 3.1/Windows® 95 t Windows® 98 (or Windows® 98 Second Edition/Windows® Me) Windows® Me/Windows® 2000 Professional t Windows® XP Multi-boot environment with Windows® 2000 (or Windows® XP) and Windows® 98 (or Windows® 98 Second Edition/Windows® Me) · Display: High (16 bit) Color or more (800 × 480 dot or more) · Internet access: for Web registration and EMD services · Windows Media Player (Version 6.4 or higher) installed for playing MP3 files. · Windows Media Player (Version 7.0 or higher) installed for playing WMA files. · We do not assure the operation of MusicClip on the computer other than VAIO series computer. Notes · We do not assure trouble-free operation for all computers satisfying the system requirements. · Trouble-free operation is not guaranteed following the self-conducted upgrade of home-built PCs oroperating systems.
11
MDS-NT1 SECTION 2 GENERAL
· LOCATION OF CONTROLS Front View
This chapter tells you about the location and function of the various buttons, controls on the MD deck.
This section is extracted from instruction manual.
Rear View
1
2
3
1
6
1 N/> button
Press while the unit is stopped to start playback. Press while the unit is playing to locate the beginning of the next track.
5
5 Net MD lamp
4
4
1 DC IN 9V jack
Connect this jack to a wall outlet via the supplied AC power adaptor to power the MD deck.
3
2
2 MD insertion slot
Insert the MD as illustrated below. With the labeled side up
Indicates the USB connection status between the unit and the computer. Lights dimly when the unit is connected only to a wall outlet with the supplied AC adaptor. Lights brightly when the unit is connected to a computer with its operating system running.
2 USB port
Connect this port to a USB port on your computer with the supplied USB cable.
6 Playback indicator
Lights during playback. Flashes while the MD's TOC is being loaded by the MD deck.
3 Headphones jack and PHONE LEVEL control
Connect a headphones plug to this jack. Turn the PHONE LEVEL control to adjust the volume of the connected headphones.
Notes
With the arrow pointing towards the deck · Except for operation of the x/Z button for ejecting the MD, all other operations on the MD deck are disabled while the Net MD is connected through the supplied USB cable to a computer with its operating system running. Under these conditions, the Net MD lamp flashes (the other indicators remain off) whenever you attempt to do an operation that is disabled. · The flashing of the Net MD lamp and flashing or lighting up of the other indicators are indications that the MD deck's self-diagnosis function is active. For details, see page 12.
3 x/Z button
Press while the unit is playing to stop playback. Press while the unit is stopped to eject the MD.
4 ANALOG OUT jack
Connect active speakers, etc. to this jack with the supplied audio connecting cord (stereo mini-plug ×1 y stereo mini-plug ×1) or optional audio connecting cord (stereo mini-plug ×1 y phono plug ×2).
4 Recording indicator
Lights up in the following cases: While an audio file is being transferred from the connected computer to the MD deck (check-out). While an audio file is being transferred from the MD deck to the connected computer (check-in). When TOC information (such as track information) has not been recorded to the MD. Flashes when overwriting of the MD's TOC by the MD deck is started by pressing x/Z .
or
12
MDS-NT1 SECTION 3 DISASSEMBLY
· This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY FLOW
can be performed in any order. , the next process can not be performed.
Note: The process described in
Note: Without completing the process described in
SET
3-2. CASE (UPPER) (Page 14)
3-4. MD MECHANISM DECK (MDM-7S2B) (Page 15)
3-3. MAIN BOARD (Page 15)
3-6. BD (MD) BOARD (Page 16) 3-6. OVER WRITE HEAD (HR901) (Page 16) 3-7. HOLDER ASSY (Page 17)
3-6. BD (MD) BOARD (Page 16) 3-7. HOLDER ASSY (Page 17)
3-5. FRONT PANEL SECTION (Page 16)
3-8. LOADING MOTOR ASSY (M103) (Page 17)
3-9. SLED MOTOR ASSY (M102) (Page 18)
3-10. OPTICAL PICK-UP (KMS-262E) (Page 18)
3-11. SPINDLE MOTOR ASSY (M101) (Page 19)
13
MDS-NT1
Note: Follow the disassembly procedure in the numerical order given.
3-2.
CASE (UPPER)
Note 1: Fold down the flat type wire (7 core) in the direction of the arrow at the first setout, then install the upper case.
wire (flat type) (7 core)
2 case (upper)
wire (flat type) (7core)
1 three screws (BVTP3 × 10) 1 three screws (BVTP3 × 10)
lead wire
Note 2: Check that the lead wire is connected vertically to the chassis before installing the upper case. If the lead wire is not connected vertically, it may be caught between the upper case. chassis chassis
lead wire
lead wire
OK
NG
14
MDS-NT1
3-3.
MAIN BOARD
1 wire (flat type) (23 core) (CN102) 1 wire (flat type) (27 core) (CN101)
1 wire (flat type) (7 core) (CN104)
3 screw (BVTP3 × 8)
3 screw (BVTP3 × 8)
4 MAIN board
2 screw (BVTT3 × 8)
3-4.
MD MECHANISM DECK (MDM-7S2B)
1 wire (flat type) (23 core) (CN102) 2 four screws (BVTTWH M3) 1 wire (flat type) (27 core) (CN101)
3 MD mechanism deck (MDM-7S2B)
15
MDS-NT1
3-5.
FRONT PANEL SECTION
4 two screws (BVTT3 × 5) 1 wire (flat type) (7 core) (CN104)
5 front panel section
wire (flat type) (7 core)
Note: Set the wire (flat type) as illustrated, then install the front panel section.
2 lead wire
3-6.
BD BOARD, OVER WRITE HEAD (HR901)
Note: By means of removing 1 connector (CN104), BD board can be removed without removing the over write head (HR901).
3 two screws (K3 × 8)
2 screw (P1.7 × 6)
3 over write head (HR901)
Note: The over write head (HR901) should be handled with care as it is damaged easily.
4 Remove four solders.
8 BD board
BD board (side B)
6 1 connector (CN104)
4 Remove five solders. 5 two screws (PWH1.7 × 3.5)
7 flexible board (CN101)
16
MDS-NT1
3-7.
HOLDER ASSY
2 claw 6 holder assy 3
5
4 boss
1 tension spring (holder)
4 boss
3-8.
LOADING MOTOR ASSY (M103)
1 belt (loading)
2 two screws (PWH1.7 × 2.5)
3 loading motor assy (M103)
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MDS-NT1
3-9.
SLED MOTOR ASSY (M102)
3 4 slider (EJ)
5 With holding the claw, slide the slider fully in the direction of arrow A. A
6 slider
8 lever (head)
2 guide (L) 1 two screws (B2 × 6)
7 lever (CHG)
9 two screws (PWH1.7 × 2.5)
0 sled motor assy (M102)
3-10. OPTICAL PICK-UP (KMS-262E)
qa optical pick-up (KMS-262E)
1 flexible board
7 Pull out the main shaft.
0 SL base 9 screw (P1.7 × 6)
8
6 two screws (KTP2 × 6)
4 screw (B2 × 6)
5 base (BU-A)
3 gear (SD) 2 screw (M1.7)
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MDS-NT1
3-11. SPINDLE MOTOR ASSY (M101)
2 spindle motor assy (M101)
1 three screws (M1.7)
19
MDS-NT1 SECTION 4 TEST MODE
Note 1:The test mode and recording of this set are controlled by a personal computer, thus requiring the set to be connected to the PC. Prepare the personal computer in which necessary software is already installed. · Attached software "OpenMG Jukebox" (necessary for recording (check in, check out)) (Part No. : 4-237-880-01) · Software for test mode "TestMode_S.exe" ("TestMode_S.exe" and essential files "data_files.csv", "Net MDUSB.dil" are distributed together with the Service Manual. For the test mode, copy these three files in the same folder beforehand) Note 2:In the operation in the test mode, the operational description requiring "click [xxx]" means that you have to click the button on the screen. ("xxx" indicates the button name) Note 3:MD always plays double speed.
4-1.
PRECAUTIONS FOR USE OF TEST MODE
· The software for test mode is used. Be sure to start the software for test mode after quitting the application software. · As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the [EJECT] is clicked while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to click the [EJECT] button after clicking the [MENU/NO] and the rotation of disc is stopped. 4-1-1. Recording laser emission mode · Continuous recording mode (CREC MODE) · Laser power check mode (LDPWR CHECK) · Laser power adjustment mode (LDPWR ADJUST) · Iop check (Iop compare) · Iop value non-volatile writing (Iop NV save) · Traverse (MO) check (EF MO CHECK) · Traverse (MO) adjustment (EF MO ADJUST)
4-2.
SETTING THE TEST MODE
1. Press the [ B/> ] button and [x/Z] button until the NetMD indicator turns off (for more than 3 seconds). (During this step, the USB cable must be disconnected) 2. Connect the set to the PC with the attached USB cable. 3. Start up the software for test mode. 4. Click the [TEST MODE]. 5. When the test mode is set, "[Check]" will be displayed. Click the [JOG UP] or [JOG UP] switches between the following three groups; ···Tt [Check] Tt [Service] Tt [Develop] Tt ···.
Note: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, click the [MENU/NO] immediately to exit the [Develop] group.
4-3.
RELEASING THE TEST MODE
Quit the software for test mode after [REPEAT] is clicked.
Note: When retrying test mode setting, perform the setting method from the start once again.
4-4.
BASIC OPERATIONS OF THE TEST MODE
All operations are performed clicking the [JOG UP], [JOG DOWN], [PUSH], [ENTER/YES], and [MENU/NO]. The functions of these buttons are as follows.
Function name Function Select Set Sub menu Proceeds onto the next step. Finalizes input Returns to previous step. Stops operations
[JOG UP], [JOG DOWN] [PUSH] [ENTER/YES] [MENU/NO]
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MDS-NT1
4-5.
SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by clicking the [JOG UP] or [JOG DOWN]. After selecting the group to be used, click the [ENTER/YES]. After setting a certain group, click the [JOG UP] or [JOG DOWN] switches between these modes. Refer to "Group" in the table for details can be selected. All items used for servicing can be treated using group [Service]. So be carefully not to enter other groups by mistake.
Note: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, click the [MENU/NO] immediately to exit the [Develop] group. Group Display AUTO CHECK Err Display TEMP ADJUST LDPWR ADJUST Iop Write Iop NV Save EF MO ADJUST EF CD ADJUST FBIAS ADJUST AG Set (MO) AG Set (CD) TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFORMATION CPLAY2MODE CREC 2MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C25 C26 C27 C28 C31 C36 C37 Automatic self-diagnosis Error history display, clear Temperature compensation offset adjustment Laser power adjustment Iop data writing Writes current Iop value in read nonvolatile memory using microprocessor Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Auto gain output level adjustment (MO) Auto gain output level adjustment (CD) Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S-curve check Nonvolatile memory check Detrack check Most circumference check Iop data display Comparison with initial Iop value written in nonvolatile memory Initialization of nonvolatile memory for adjustment values Display of microprocessor version, etc. Continuous playback mode Continuous recording mode Details Mark Check Service
· For details of each adjustment mode, refer to "SECTION 5. Electrical Adjustments". For details of "Err Display", refer to "Self-Diagnosis Function" on page 2. · If a different mode has been selected by mistake, click the [MENU/NO] to release that mode. · Modes with (×) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, click the [MENU/NO] to release the mode immediately.
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MDS-NT1
4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode (1) Set the disc in the unit. (Whichever recordable discs or discs for playback only are available) (2) Click the [JOG UP] or [JOG DOWN] and display "CPLAY2MODE" (C36). (3) Click the [ENTER/YES] to change the display to "CPLAY2MID". (4) When access completes, the display changes to "C = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
2. Changing the parts to be played back (1) Click the [ENTER/YES] during continuous playback to change the display as below. "CREC 2MID" t "CREC 2OUT" t "CREC 2IN" When clicked another time, the parts to be played back can be moved. When access completes, the display changes to "C = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
(2)
3. Ending the continuous playback mode (1) Click the [MENU/NO]. The display will change to "CPLAY2MODE" (C36). (2) Click the [EJECT] and take out the disc.
Note: The playback start addresses for IN, MID, and OUT are as follows.
IN 40h cluster MID 300h cluster OUT 700h cluster 4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check) 1. Entering the continuous recording mode (1) Set a recordable disc in the unit. (2) Click the [JOG UP] or [JOG DOWN] and display "CREC 2MODE" (C37). (3) Click the [ENTER/YES] to change the display to "CREC 2MID". ". (4) When access completes, the display changes to "CREC 2 (
Note: The numbers " " displayed shows you the recording position addresses.
2. Changing the parts to be recorded (1) When the [ENTER/YES] is clicked during continuous recording, the display changes as below. "CREC 2MID" t "CREC 2OUT" t "CREC 2IN" When clicked another time, the parts to be recorded can be changed. ". When access completes, the display changes to "CREC 2 (
Note: The numbers " " displayed shows you the recording position addresses.
(2)
3. Ending the continuous recording mode (1) Click the [MENU/NO]. The display changes to "CREC 2MODE" (C37). (2) Click the [EJECT] and take out the disc.
Note 1: The recording start addresses for IN, MID, and OUT are as follows.
IN 40h cluster MID 300h cluster OUT 700h cluster Note 2: The [MENU/NO] can be used to stop recording anytime.
Note 3: Do not perform continuous recording for long periods of time above 5 minutes. Note 4: During continuous recording, be careful not to apply vibration.
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MDS-NT1
4-6.
AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform AUTO CHECK after the laser power check and Iop check. Procedure: 1. Click the [ENTER/YES]. If "LDPWR " is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded in step 4, the check will automatically be resumed from "07 CHECK". 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
4-7.
INFORMATION
Display the software version. Procedure: 1. If displayed as "INFORMATION", click the [ENTER/YES]. 2. The software version will be displayed. 3. Click the [MENU/NO] to end this mode.
23
MDS-NT1 SECTION 5 ELECTRICAL ADJUSTMENTS
Note 1:The test mode and recording of this set are controlled by a personal computer, thus requiring the set to be connected to the PC. Prepare the personal computer in which necessary software is already installed. · Attached software "OpenMG Jukebox" (necessary for recording (check in, check out)) (Part No. : 4-237-880-01) · Software for test mode "TestMode_S.exe" ("TestMode_S.exe" and essential files "data_files.csv", "Net MDUSB.dil" are distributed together with the Service Manual. For the test mode, copy these three files in the same folder beforehand) Note 2:In the operation in the test mode, the operational description requiring "click [xxx]" means that you have to click the button on the screen. ("xxx" indicates the button name) Note 3:MD always plays double speed.
5-1.
PARTS REPLACEMENT AND ADJUSTMENT
If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check.
Check before replacement
Start
5-7-2. Laser Power Check (See page 28) OK
NG
5-7-3. Iop Compare (See page 28) OK
NG
5-7-4. Auto Check (See page 29) OK
NG
Replace optical pick-up or MDM-7S2B
Other faults are suspected. Check the mechanism (sled motor, etc).
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MDS-NT1
Adjustment flow
Start
· Abbreviation OP: optical pick-up
Replace OP or IC195* NO
YES
5-8. INITIAL SETTING OF ADJUSTMENT VALUE (See page 31)
Replace IC101, IC195*, or D101 NO
YES
5-10. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 31)
Replace OP, IC933, or IC195* NO
YES
5-11. LASER POWER ADJUSTMENT (See page 31)
Replace OP, IC701, IC933, or IC195* NO
YES
5-12. Iop NV SAVE (See page 32)
Replace OP, IC101, IC201, or IC195* NO
YES
5-13. TRAVERSE ADJUSTMENT (See page 32) 5-14. FOCUS BIAS ADJUSTMENT (See page 33) 5-17. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT (See page 34)
Replace OP NO
YES
OP change in Err Display mode Iop write
Replace the spindle motor NO 5-7-4. Auto Check (See page 29)
YES
Spindle change in Err Display mode
End adjustments
* The IC195 cannot be replaced with a new part. For derail refer to "Notes on Replacing BD Board or MD Mechanism Deck" (See page 7).
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MDS-NT1
5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
5-4. HOW TO IDENTIFY OPTICAL PICK-UP KMS262A/KMS-262E
This set uses optical pick-up KMS-262E in the production, but for the repair, only the KMS-262A is supplied. As a result, two types of optical pick-ups are used for this set, and the specified values for the check and adjustment of the laser power vary depending on the type. Therefore, in performing the check and adjustment of the laser power, first make sure the type of optical pick-up. The type of optical pick-up can be identified as follows.
5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-262A/262E)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up
KMS-262A
[Top view] [Side view]
KMS-262E
[Top view] [Side view]
flexible board
laser tap
Optical pick-up flexible board
TYPE2 VR (small) TYPE3 VR (large)
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MDS-NT1
5-5. PRECAUTIONS FOR ADJUSTMENTS
1. When replacing the following parts, perform the adjustments and checks with in the order shown in the following table. 2. Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in "group Service" of the test mode. 3. Perform the adjustments to be needed in the order shown. 4. Use the following tools and measuring devices. · Check Disc (MD) TDYS-1 (Part No. : 4-963-646-01) · Test Disk (MDW-74/GA-1) (Part No. : 4-229-747-01) · Laser power meter LPM-8001 (Part No. : J-2501-046-A) or MD Laser power meter 8010S (Part No. : J-2501-145-A)*1 · Oscilloscope (Measure after performing CAL of prove) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (Part No. : J-2501-149-A) · Attached software "OpenMG Jukebox" (Part No. : 4-237-880-01) · Software for test mode (Distributed together with the Service Manual) · Attached USB cable (Part No. : 1-757-471-11) · Personal computer (Refer to Servicing Notes) 5. When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited) 6. Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Note on page 8) 7. As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it. 8. In normal operation check after the completion of adjustment, be sure to perform the recording check (check in, check out) using the software "OpenMG Jukebox" attached. *1 Laser power meter When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. : J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.
Parts to be replaced Adjustment 7. Initial setting of adjustment value 8. Recording of Iop information 9. Temperature compensation offset adjustment Optical Pick-up IC101 IC701 IC201 IC933 IC195* D101
10. Laser power adjustment 11. Iop NV Save 12. Traverse adjustment 13. Focus bias adjustment 16. Auto gain adjustment 6-4. AUTO CHECK * The IC195 cannot be replaced with a new part. For detail refer to "Notes on Replacing BD Board or MD Mechanism Deck" (See page 7).
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MDS-NT1
5-6. USING THE CONTINUOUSLY RECORDED DISC
* This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Check the [JOG UP] or [JOG DOWN] and display "CREC 2MODE" (C37). 3. Click the [ENTER/YES] again to display "CREC 2MID". Display "CREC 2 (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Click the [MENU/NO] and stop recording . 6. Click the [EJECT] and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment and error rate check.
Note: Be careful not to apply vibration during continuous recording.
Checking Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (Iop). 2. Then, click the [JOG UP] or [JOG DOWN] and display "LDPWR CHECK" (C13). 3. Click the [ENTER/YES] once and display "L 0.90 mW $ ". Check that the reading of the laser power meter become specified value. Specified Value: Laser power meter reading : 0.84 to 0.92 mW (KMS-262A) 0.90 to 0.96 mW (KMS-262E) 4. Click the [ENTER/YES] once more and display "L 8.40 mW $ " (KMS-262A) or "L 8.65 mW $ " (KMS-262E). Check that the reading the laser power meter and digital volt meter satisfy the specified value. Specified Value: Laser power meter reading : 8.4 ± 0.3 mW (KMS-262A) 8.65 ± 0.25 mW (KMS-262E) Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
5-7. CHECKS PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (see page 10). 5-7-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature to 22 to 28ºC. Checking Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "TEMP CHECK" (C12). 2. Click the [ENTER/YES]. 3. "T=@@(##) [OK" should be displayed. If "T=@@ (##) [NG" is displayed, it means that the results are bad. (@@ indicates the current value set, and ## indicates the value written in the non-volatile memory) 5-7-2. Laser Power Check Before checking, check the Iop value of the optical pick-up. (Refer to 5-9. Recording and Displaying the Iop Information (see page 31) Connection:
laser power meter
262A 20101 B0825
(For details of the method for checking this value, refer to "6-9. Recording and Displaying the Iop Information")
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Click the [MENU/NO] and display "LDPWR CHECK" (C13) and stop the laser emission. (The [MENU/NO] is effective at all times to stop the laser emission)
Note: After step 4, each time the [ENTER/YES] is clicked, the display will be switched between "L 0.70 mW $ " and "L 7.50 mW $ ", Nothing needs to be performed here.
Checking Location: BD board (see page 35) 5-7-3. Iop Compare The current Iop value at laser power 8.4 mW output and reference Iop value (set at shipment) written in the nonvolatile memory are compared, and the rate of increase/decrease will be displayed in percentage.
Optical pick-up objective lens
digital voltmeter BD board CN105 pin 1 (I +3 V) CN105 pin 2 (Iop)
+
Note: Perform this function with the optical pick-up set at room temperature.
Procedure: 1. Click the [JOG UP] or [JOGDOWN] to display "Iop Compare" (C27). 2. Click the [ENTER/YES] and start measurements. 3. When measurements complete, the display changes to "±xx%yy". xx is the percentage of increase/decrease, and OK or NG is displayed at yy to indicate whether the percentage of increase/ decrease is within the allowable range. 4. Click the [MENU/NO] to end this mode.
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MDS-NT1
5-7-4. Auto Check This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure: 1. Click the [ENTER/YES]. If "LDPWR " is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded, the check will automatically be resumed from "07 CHECK". 6. After completing to test item "12 check", check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, sled motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up. 5-7-5. Other Checks All the following checks are performed by the Auto Check mode. They therefore need not be performed in normal operation. 5-7-6. Traverse Check 5-7-7. Focus Bias Check 5-7-8. C PLAY Check 5-7-9. Self-Recording/Playback Check
5-7-6. Traverse Check
Note 1: Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2: If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
BD board CN105 pin 4 (TE) CN105 pin 6 (VC)
330 k
+
10 pF
Connection:
oscilloscope (DC range) BD board CN105 pin 4 (TE) CN105 pin 6 (VC)
+
V: 0.1 V/div H: 10 ms/div
Checking Procedure: 1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) on the BD (MD) board. 2. Load a disc (any available on the market). (Refer to Note 1) 3. Click the [FF] to move the optical pick-up outside the pit and click the [STOP] to stop. 4. Click the [JOG UP] or [JOG DOWN] to display "EF MO CHECK"(C14). 5. Click the [ENTER/YES] to display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) 6. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not click the [JOG UP] or [JOG DOWN]. (Read power traverse checking)
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = I A B I X 100 2 (A + B)
7. Click the [ENTER/YES] to display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not click the [JOG UP] or [JOG DOWN]. (Write power traverse checking)
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = I A B I X 100 2 (A + B)
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MDS-NT1
9. Click the [ENTER/YES] to display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not click the [JOG UP] or [JOG DOWN].
Traverse Waveform
A VC B Specified value : Below 10% offset value Offset value (%) = I A B I X 100 2 (A + B)
11. Click the [ENTER/YES] to display "EF MO CHECK (C14)". The disc stops rotating automatically. 12. Click the [EJECT] button and take out the disc. 13. Load the check disc (MD) TDYS-1. 14. Click the [JOG UP] or [JOG DOWN] and display "EF CD CHECK" (C15). 15. Click the [ENTER/YES] to display "EFB = CD". Servo is imposed automatically. 16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not click the [JOG UP] or [JOG DOWN].
Traverse Waveform
5-7-7. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure: 1. Load the test disk (MDW-74/GA-1). 2. Click the [JOG UP] or [JOG DOWN] to display "CPLAY2 MODE" (C36). 3. Click the [ENTER/YES] to display "CPLAY2MID". 4. Click the [MENU/NO] when "C = AD = " is displayed. 5. Click the [JOG UP] or [JOG DOWN] to display "FBIAS CHECK" (C16). / c = ". 6. Click the [ENTER/YES] to display " The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 20 and ADER is below 2. 7. Click the [ENTER/YES] to display " / b = ". Check that the C1 error is about 100 and ADER is below 2. 8. Click the [ENTER/YES] to display " / a = ". Check that the C1 error is about 100 and ADER is below 2. 9. Click the [MENU/NO], then click the [EJECT] and take out the test disc. 5-7-8. C PLAY Check MO Error Rate Check Checking Procedure: 1. Load the test disk (MDW-74/GA-1). 2. Click the [JOG UP] or [JOG DOWN] to display "CPLAY2 MODE" (C36). 3. Click the [ENTER/YES] to display "CPLAY2MID". 4. The display changes to "C = AD = ". 5. If the C1 error rate is below 20, check that ADER is 00. 6. Click the [MENU/NO] to stop playback, then Click the [EJECT] and take out the test disc. CD Error Rate Check Checking Procedure: 1. Load the check disc (MD) TDYS-1. 2. Click the [JOG UP] or [JOG DOWN] to display "CPLAY2 MODE" (C36). 3. Click the [ENTER/YES] to display "CPLAY2MID". AD = ". 4. The display changes to "C = 5. Check that the C1 error rate is below 20. 6. Click the [MENU/NO] to stop playback, then click the [EJECT] and take out the check disc. 5-7-9. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure: 1. Load a recordable disc (blank disc). 2. Click the [JOG UP] or [JOG DOWN] to display "CREC 2MODE" (C37). 3. Click the [ENTER/YES] to display "CREC 2MID". 4. When recording starts and display "CREC 2 @@@@" (@@@@ is the address). 5. About 1 minute later, click the [MENU/NO] to stop continuous recording. 6. Click the [JOG UP] or [JOG DOWN] to display "CPLAY2 MODE" (C36). 7. Click the [ENTER/YES] to display "CPLAY2MID". 8. "C = AD = " will be displayed. 9. Check that the C1 error becomes below 20 and the AD error below 2. 10. Click the [MENU/NO] to stop playback, then click the [EJECT] and take out the disc.
A VC B Specified value : Below 10% offset value Offset value (%) = I A B I X 100 2 (A + B)
17. Click the [ENTER/YES] to display "EF CD CHECK" (C15). 18. Click the [EJECT] and take out the check disc (MD) TDYS-1. Check Location: BD board (see page 35)
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5-8. INITIAL SETTING OF ADJUSTMENT VALUE
Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to "5-5. Precautions for Adjustments" and execute the initial setting before the adjustment as required.
5-10.TEMPERATURE COMPENSATION OFFSET ADJUSTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data.
Note: 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.
Setting Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "ADJ CLEAR" (C28). 2. Click the [ENTER/YES]. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" (C28) will be displayed.
5-9. RECORDING AND DISPLAYING THE Iop INFORMATION
The Iop data can be recorded in the non-volatile memory. The Iop value on the optical pick-up label and the Iop value after the adjustment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up. Recording Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "Iop Write" (C05), and click the [ENTER/YES]. 2. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 3. Input the Iop value on the optical pick-up label. To select the number : Click the [JOG UP] or [JOG DOWN]. To select the digit : Click the [PUSH]. 4. When the [ENTER/YES] is clicked, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 5. As the adjustment results are recorded for the 4 value. Leave it as it is and click the [ENTER/YES]. 6. "Complete!!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write" (C05). Display Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "Iop Read" (C26), and click the [ENTER/YES]. 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the Iop value on the optical pick-up label. ##.# indicates the Iop value after adjustment 3. To end, click the [PUSH] or [MENU/NO] to display "Iop Read" (C26).
Adjusting Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "TEMP ADJUST" (C03). 2. Click the [ENTER/YES] to select the "TEMP ADJUST" mode. 3. "TEMP = [OK" and the current temperature data will be displayed. 4. To save the data, click the [ENTER/YES]. When not saving the data, click the [MENU/NO]. 5. When the [ENTER/YES] is clicked, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" (C03) display then. When the [MENU/NO] is clicked, "TEMP ADJUST" (C03) will be displayed immediately. Specified Value: The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
5-11. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments. (Refer to 5-9. Recording and Displaying Iop Information) Connection:
laser power meter
Optical pick-up objective lens
digital voltmeter BD board CN105 pin 1 (I +3 V) CN105 pin 2 (Iop)
+
Adjusting Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, click the [FF] or [FR] to move the optical pick-up) Connect the digital voltmeter to CN105 pin 1 (I+3V) and CN105 pin 2 (Iop) on the BD (MD) board. 2. Click the [JOG UP] or [JOG DOWN] to display "LDPWR ADJUST" (C04). (Laser power : For adjustment) 3. Click the [ENTER/YES] once to display "L 0.90 mW $ ". 4. Click the [JOG UP] or [JOG DOWN] so that the reading of the laser power meter becomes specified value. Click the [ENTER/YES] after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment) Specified Value: Laser power meter reading: 0.85 to 0.91 mW (KMS-262A) 0.90 to 0.95 mW (KMS-262E) 5. Then "L 8.40 mW $ " (KMS-262A) or "L 8.65 mW $ (KMS-262E) will be displayed. "
31
MDS-NT1
6. Click the [JOG UP] or [JOG DOWN] so that the reading of the laser power meter becomes specified value, click the [ENTER/YES] to save it. Specified Value: Laser power meter reading: 8.2 to 8.6 mW (KMS-262A) 8.5 to 8.8 mW (KMS-262E)
Note: Do not perform the emission with 8.4 mW more than 15 seconds continuously.
5-12. Iop NV SAVE
Write the reference values in the nonvolatile memory to perform "Iop compare". As this involves rewriting the reference values, do not perform this procedure except when adjusting the laser power during replacement of the optical pick-up and when replacing the IC102. Otherwise the optical pick-up check may deteriorate.
Note: Perform this function with the optical pick-up set at room temperature.
7. Then, click the [JOG UP] or [JOG DOWN] to display "LDPWR CHECK" (C13). 8. Click the [ENTER/YES] once to display "L 0.90 mW $ ". Check that the reading of the laser power meter become specified value. Specified Value: Laser power meter reading: 0.84 to 0.92 mW (KMS-262A) 0.90 to 0.96 mW (KMS-262E) 9. Click the [ENTER/YES] button once more to display "L 8.40 mW $ " (KMS-262A) or "L 8.65 mW $ " (KMS-262E). Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value: Laser power meter reading : 8.4 ± 0.3 mW (KMS-262A) 8.65 ± 0.25 mW (KMS-262E) Digital voltmeter reading : Value on the optical pick-up label ±10% (Optical pick-up label)
KMS
Procedure: 1. Click the [JOG UP] or [JOG DOWN] to display "Iop NV Save" (C06). 2. Click the [ENTER/YES] and display "Iop [stop]". 3. After the display changes to "Iop =xxsave?", click the [ENTER/YES]. 4. After "Complete!" is displayed momentarily, the display changes to "Iop 8.4 mW". 5. After the display changes to "Iop=yysave?", click the [ENTER/YES]. 6. When "Complete!" is displayed, it means that Iop NV saving has been completed.
5-13. TRAVERSE ADJUSTMENT
Note 1:Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2:If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range)
BD board CN105 pin 4 (TE) CN105 pin 6 (VC)
330 k
+
10 pF
262A 20101 B0825
(For details of the method for checking this value, refer to "8. Recording and Displaying the Iop Information".)
Connection:
oscilloscope (DC range) BD board CN105 pin 4 (TE) CN105 pin 6 (VC)
+
Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
10. Click the [MENU/NO] to display "LDPWR CHECK" (C13) and stop the laser emission. (The [MENU/NO] is effective at all times to stop the laser emission.) 11. Click the [JOG UP] or [JOG DOWN] to display "Iop Write" (C05). 12. Click the [ENTER/YES] . When the display becomes Ref=@@@.@ (@ is an arbitrary number), click the [ENTER/